Benthic communities and biodiversity in Thai mangrove swamps

泰国红树林沼泽的底栖群落和生物多样性

• 批准号: 06041008
• 负责人: NISHIHIRA Moritaka
• 金额: $ 2.94万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06041008/
• 关键词: mangrove swamp; benthos; biodiversity; haitat; mud flat; Thailand

1. Field studies were conducted at the Klong Kone mangrove swamps in Samut Songkram Province in Thailand. Following a general survey of the mangrove swamps, we selected several points for detailed samplings along two transact lines. These study points were selected in order to cover various environmental conditions in the area : from mud flat to landward fringe of the mangrove forest.2. Temperature and Eh of the sediments and pH,salinity and nutrient concentrations in the interstitial water were measured. Organic matters in the sediments at the mud flat were lower than those inside the forest. We started monitoring works.3. We studied benthic fauna and tree fauna separately, conducting both quantitative and qualitative samplings. In outer mud flat, an alphaeid shrimp, a stomatopod, and ocypodid crabs were regular species encountered. Cockle was also frequent and polychaete worms were regular animals to be sampled. In the seeward ex-mangrove fringe, benthic fauna was similar to that in the mud flat. In the landward fringe of the forest, erobid snails were abundant and neritid gastropod was also found. Two species of ocypodid crabs and sesarmid crabs were prominent members in the mangrove forest fauna. Crabs were collected for analysis of stomach content and allometry studies.4. We had planned to study recolonization process of the discarded mangrove swamps by benthic animals.However, we could not find appropriate places for such study this time.5. For population studies of some useful animals, we selected a cockle (Anadara). After measurement of shell size, cockles were put in the cages and set at several selected plots to follow survival and growth. For the studies of colonization processes of the barnacles, plastic poles were set at several different environments as the settlement substrate for monitoring works.

1.在泰国Samut Songkram省的Klong Kone红树林沼泽进行了实地研究。在对红树林沼泽进行全面调查后，我们沿着两条交易线选择了几个点进行详细采样。选择这些研究点是为了涵盖该地区的各种环境条件：从泥滩到红树林向陆地的边缘。测量了沉积物的温度和Eh，以及间隙水中的pH、盐度和营养盐浓度。滩涂沉积物中的有机质含量低于林内沉积物。我们开始监测工作。我们分别研究了底栖动物和乔木动物，进行了定量和定性采样。在外滩，甲虾、口足类和环足蟹是经常遇到的物种。鸡瘟也很常见，多毛类蠕虫是经常被抽样的动物。在下水道前红树林边缘，底栖动物与泥滩相似。在森林的陆地边缘，有大量的蠕形蜗牛，也发现了神经性的腹足动物。两种环足蟹和芝麻蟹是红树林动物群中的重要成员。采集蟹类进行胃内容物分析和异速生长研究。我们原计划研究被底栖动物抛弃的红树林沼泽的重新定居过程，但这次找不到合适的地点进行这项研究。为了对一些有用的动物进行种群研究，我们选择了一种鹦鹉(阿纳达拉)。在测量了贝壳大小后，将雏鸟放在笼子里，并在选定的几个地块上放置，以跟踪存活和生长。为了研究藤壶的定殖过程，在几个不同的环境中放置了塑料杆作为监测工作的沉降物。